Aaron Mittelstet

Aaron Mittelstet, Ph.D.

Contact Information:
245 L.W. Chase Hall
Lincoln: East Campus
(402) 472-1427

Watershed Hydrologist, Assistant Professor, Robert B. Daugherty Water For Food Institute Fellow
Academic Degrees
  • Ph.D., Biosystems and Agricultural Engineering, Oklahoma State University
  • M.S., Environmental Science, Oklahoma State University
  • B.S., Zoology, Oklahoma State University

Current Graduate Students

Naisargi Dave, M.S. Environmental Engineering, Biological Systems Engineering

Olufemi Abimbola, PhD Biological Systems Engineering

  • 60% Research
  • 40% Teaching
Areas of Research and Professional Interest
  • Watershed Modeling
  • Surface/Ground Water Interaction
  • Water Quality
  • Streambank Erosion
Courses Taught

Honors and Awards

  • M.S. student Naisargi Dave won 1st Place at the 2017 Water for Food Conference Poster Contest
  • 2nd Place, Student Poster Contest, 23rd Annual Oklahoma Clean Lakes and Watersheds Association Conference, Stillwater, OK, 2014.
  • Outstanding Manuscript Reviewer Award, ASABE, 2013.
  • 3rd Place, Student Poster Contest,  OWRRI Oklahoma Water Research Symposium, Midwest City, OK, 2013.
  • 2nd place, Environmental Science Graduate Paper Presentation, OWRRI Oklahoma State Water Research Symposium, Stillwater, OK, 2011.
  • Jimmie Pigg Environmental Policy Research Assistantship, 2009.


  • “Quantifying the Effects of Eastern Red Cedar Encroachment on Recharge in the Nebraska Sandhills” (Aug. 2018 – July 2021)

Sponsor:  Water Sustainability Fund

PI:  A.R. Mittelstet (50%); Co-PI: C. Neale (30%); Craig Allen (10%); Dirac Twidwell (10%)

Sponsor Amount:  $144,716

Date of Submission:  07/31/17

  • “Pesticide Exposure in Recreational Lakes” (Mar, 2018-Feb. 2019)

Sponsor:  USGS 104b Program

PI:  T.L. Messer (50%); Co-PI: A.R. Mittelstet (25%); Co-PI:  D. Snow (25%)

Sponsor Amount:  $24,967

  • “Pollutant Load Reduction Due to BMP Implementation in the Big Sandy Creek Watershed” (July 2017 to June 30, 2018)

Sponsor:  Natural Resources Conservation Service

PI:  A. Mittelstet (100%)

Sponsor Amount:  $25,031

  • “Spatial Variability of Streambed Conductivity across Multiple Stream Orders” (June 2017 – May. 2018)

Sponsor:  USGS 104b Program

PI:  A.R. Mittelstet (65%); Co-PI:  T.E. Gilmore (35%)

Sponsor Amount:  $19,992

  • “Quantifying Streambank Erosion and Phosphorus Loads for Watershed Assessment and Planning” (Mar. 2015 – Feb. 2016)

Sponsor:  USGS 104b Program

PI:  A.R. Mittelstet (50%); Co-PI: D.E. Storm (50%)

Sponsor Amount:  $25,000

  • “Application of Isotopic Tracers to Determine Water Residence Times in Multi-Scale Water Management” (May 2017 – April 2019)

Sponsor:  University of Nebraska: Sprint 4th Edition

PI:  T. Gilmore (50%) Co-PI: A. Mittelstet (30%), J. Korus (20%)

Sponsor Amount:  $19,983

  • “Managing Water Resources at the U.S. Meat and Animal Research Center” (July 3, 2017 – December 31, 2019)

Sponsor:  ARD & US MARC

PI:  A. Mittelstet (50%) Co-PI: T. Messer (30%), T. Gilmore (20%)

Sponsor Amount:  $83,612

Selected Publications

  1. Dave, N. and A.R. Mittelstet, 2017. Quantifying effectiveness of streambank stabilization practices on Cedar River, Nebraska. Water. 9(12), 930. 
  2. Abimbola, O., J. Wenninger, R. Venneker and A.R. Mittelstet, 2017. Assessment of Water Resources in Ungauged Catchments in Rwanda.  Journal of Hydrology: Regional Studies. 13: 274-289. 
  3. Forsberg T.A., D.E. Radcliffe, C.H. Bolster, A.R. Mittelstet, D.E. Storm and D. Osmond, 2017. Evaluation of a quantitative phosphorus transport model for potential improvement of southern phosphorus indices. Journal of Environmental Quality. 46:1341-1348. 
  4. Bolster, C.H., T.A. Forsberg, A.R. Mittelstet, D.E. Radcliffe, D.E. Storm, J. Ramirez-Avila and D. Osmond, 2017. Comparing an annual and daily time step model for predicting field-scale phosphorus loss. Journal of Environmental Quality. 46:1314-1322. 
  5. Korus, J.K., T.E. Gilmore, M.M. Waszgis and A.R. Mittelstet, 2017. Unit-bar migration and bar-trough deposition: impacts on permeability and grain size heterogeneity in a sandy streambed. Hydrogeology.  
  6. Mittelstet, A.R., D.E. Storm, G.A. Fox and P.M. Allen, 2017 Modeling streambank erosion on composite streambanks on a watershed scale. Transactions of the ASABE. 60(3): 753-767. 
  7. Mittelstet, A.R., D.E. Storm and G.A. Fox, 2017. Testing of the modified streambank erosion and in-stream phosphorus routines for the SWAT model. Journal of the American Water Resource Association. 53(1): 101-114. 
  8. Worthington, T., T. Zhang, S. Brewer, A.R. Mittelstet and D. Logue, 2016. Landscape and flow metrics affecting the distribution of a federally-threatened fish: Improving management, model fit, and model transferability.  Ecological Modeling. 342:1-18. 
  9. Agouridis, C.T., K.R. Douglas-Mankin, A.C. Linhoss and A.R. Mittelstet, 2016. Wetlands and coastal systems: protecting and restoring valuable ecosystems. Transactions of the ASABE. 59(5): 1299-1301. 
  10.  Mittelstet, A.R. and D.E. Storm, 2016. Quantifying legacy phosphorus using a mass balance approach and uncertainty analysis.  Journal of the American Water Resource Association. 52(6):1297-1310. 
  11.  Mittelstet, A.R., D.E. Storm and M.J. White, 2016. Using SWAT to enhance watershed-based plans to meet numeric water-quality standards. Sustainability of Water Quality and Ecology. 7:5-21. 
  12.  Neupane, S., J.R. Vogel, D.E. Storm, B.J. Barfield and A.R. Mittelstet, 2015. Development of a turbidity prediction methodology for runoff-erosion models.  Water, Air and Soil Pollution.  226(12):1-14. 
  13.  Mittelstet, A.R., D.E Storm and A. Stoecker, 2015. Using SWAT and an empirical relationship to simulate crop yields and salinity levels in the North Fork River Basin. International Journal of Agricultural and Biological Engineering. 8 (3): 110-123. 
  14.  Miller, R.B., D.M. Heeren, G.A. Fox, T. Halihan, D.E. Storm and A.R. Mittelstet, 2014. The hydraulic conductivity structure of gravel-dominated vadose zones within alluvial floodplains. Journal of Hydrology. 513: 229-240. 
  15.  Heeren, D.M., G.A. Fox, A.K. Fox, D.E. Storm, R.B. Miller and A.R. Mittelstet, 2014. Divergence and flow direction as indicators of subsurface heterogeneity and stage-dependent storage in alluvial floodplains. Hydrological Process. 28(3):  1307-1317. 
  16.  White, M.J., D.E. Storm, A.R. Mittelstet, P. Busteed, B. Haggard, and C. Rossi, 2014. Development and testing of an in-stream phosphorus cycling model for SWAT. Journal of Environmental Quality. 43(1): 215-223. 
  17. Mittelstet, A.R., E.R. Daly, D.E. Storm, M.J. White, and G.A. Kloxin, 2012. Field scale modeling to estimate phosphorus and sediment load reductions using a newly developed graphical user interface for soil and water assessment tool. American Journal of Environmental Sciences: 8(6): 605-614. 
  18. Heeren, D.M., A.R. Mittelstet, G.A. Fox, D.E. Storm, A.T. Al-Madhhachi, T.L. Midgley, A.F. Stringer, K.B. Stunkel, and R.B. Tejral, 2012. Using rapid geomorphic assessments to assess streambank stability in Oklahoma Ozark streams. Transactions of the ASABE. 55(3): 957-968. 
  19. Mittelstet, A.R., D.M. Heeren, G.A. Fox, D.E. Storm, M.J. White, and R. B. Miller, 2011. Comparison of subsurface and surface runoff phosphorus. Agriculture, Ecosystems, and Environment. 141: 417-425. 
  20. Fox, G.A., D.M. Heeren, R.B. Miller, A.R. Mittelstet, and D.E. Storm. 2011, Flow and transport experiments for a streambank seep originating from a preferential flow pathway. Journal of Hydrology. 403: 360-366. 
  21. Heeren, D.M., G.A. Fox, R.B Miller, D.E. Storm, A.K Fox, C.J. Penn, T. Halihan, and A.R. Mittelstet, 2011.  Stage-dependent transient storage of phosphorus in alluvial floodplains.  Hydrological Processes.  25(20): 3230-3243. 
  22. Mittelstet, A.R., M.D. Smolen, G.A. Fox, and D.A. Adams, 2011. Comparison of aquifer sustainability under groundwater administrations in Oklahoma and Texas. Journal of the American Water Resource Association.  47(2): 424-431. 

Recent Presentations


  1.  A.R. Mittelstet, T.L. Messer and T.E. Gilmore (2017). “Managing Water Resources at the U.S. Meat and Animal Research Center”, Invited Speaker at 3rd Annual Meeting of IANR ARD and US MARC on Enhanced Research Collaborations, US Meat Animal Research Center, Clay Center, NE, November 29, 2017.
  2.  A.R. Mittelstet and T.E. Gilmore (2017). “Groundwater Age: Applications from Brazil to Bazile”, Invited Speaker at Biological Systems Engineering Colloquium, University of Nebraska, Lincoln, NE, November 15, 2017.
  3.  T.E. Gilmore and A.R. Mittelstet. (2017). “Groundwater in Nebraska”, Invited Speaker at UNESP, Sau Paulo University, Rio Claro, Brazil, September 29, 2017.
  4.  A.R. Mittelstet. (2016) “Quantifying Phosphorus and Sediment Loads in the Ozark Highland Ecoregion Using the SWAT Model”, Invited Speaker at the Nebraska Environmental Quality Brown Bag Luncheon Seminar Series, Lincoln, NE, November 30, 2016.
  5.  A.R. Mittelstet. (2016) “Water Quality Risks Associated with Poultry Production”, Invited Speaker for the Livestock & Poultry Expansion: Critical Issues for Discussion with Farmers & Communities, Lincoln, NE, July 22, 2016.
  6.  A.R. Mittelstet and D.E. Storm. (2014) “Application of Remote Sensing to Watershed Hydrologic/Water Quality Modeling”, Invited Speaker at the Oklahoma Workshop on Remote Sensing Technology and Application, Norman, OK, November 12, 2014.
  7.  A.R. Mittelstet. (2011) “Texas BMP Evaluation Tool”, Invited Speaker at the Southern Region Water Conference, Athens, GA, September 14, 2011.